Use a regular STL map instead of unordered_map.
Use a regular STL map instead of unordered_map.

Older branches of Android don't support std::unordered_map.

Bug 28006371

Change-Id: I162249db3b7ee9537c7143768c6c1ec216392cba
Reviewed-on: https://swiftshader-review.googlesource.com/5045
Reviewed-by: Bo Hu <ebffee6bd97c38a860b94af3e3266be6e69b2c5f@google.com>
Tested-by: Nicolas Capens <0612353e1fcebbfd4b302d9337447ca0cdfa9122@google.com>
(cherry picked from commit db4fee2752c3b440933fd89078e35b3781c211ce)
Reviewed-on: https://swiftshader-review.googlesource.com/5047
Reviewed-by: Nicolas Capens <0612353e1fcebbfd4b302d9337447ca0cdfa9122@google.com>

google/swiftshader,google/swiftshader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader